How do I make hair particles appear on top of the emitter and not through it?
Some things to verify when making grass or other hair objects from a mesh item:


Is object origin where you want the particle to attach to the ground?





Are you copying rotation? (You can, or can not, as Yoda would say... but be aware of what it is set for...)





Are you adding roundness or radius?





Is the object being used as a hair positioned weirdly relative to global axes?





Is there weirdness interjected by velocity or physics settings?




And I bet I am forgetting some... but the one I always start with is "where is my origin, and what is the object rotation?"